Temperature-regulator.



TATRNTRD MAY 26, 1908.l

v. T. DAVIS.

TEMPERATURE REGULATOR.

APPLICATION FILED 0015.15, 1906- ATTORNEY.

- .VERNER F. DAVIS, or ORANGE, NEW JERSEY.

TEMPERATURE-REGULATOR.

To all whom it may concern.'

Be it known that I, VERNER F. DAVIS, a citizen of the United States, residing at Orange, in the county of Essex and State of New Jersey,- have invented certain new and usefullmprovements in Temperature-Re ulators and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others ,skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

p This invention relates-to a temperature regulator'for regulating the temperature in rooms or tanks of liquid, or any place where,` it is necessary to maintain an even temperature, and the device provides a regulator of this class that can be .adjusted so that the temperature can be predetermined, and is dev signed to provide a regulator `that is easily spection.

separable for the purposes of repairing or in- A'novel feature of this construction is a steel or similar follower insideof the veX- pansible and contractible tube susceptible to temperature changes, and mechanism for holding the end of the rod-in contact with the end of the tube.

The invention is illustrated in the accoin-v panying drawings, in which l Figure 1 is a diagrammatic view of the regulator in its relation tothe means for con.

trolling "the admission .of the heating medium. Fig. 2` is a vertical longitudinal section ofthe regulator. Fig. 3-is a section on line 3, 3, in Fig. 2. Fig. 4 1s abottom View of a part of the casing showin an index. Fig.

.lator itself is composed o 5 1s a section on line 5, 5, in ig. 2, and Figs. 6 and 7 are a horizontal' section and an end of a modified form of installing the means for adjusting the regulator.

. The regulator is used to. control the supply of a heating medium to a chamber or tank, the regulator -10 being provided with a pipe 11 which admits compressed air to it, and an outlet 1`2`is in communication with the regulator'lO, so that when the regulator'is in atemperature above a predetermined degree, compressed air is admitted tothe pi y)e 12 and operates a dia hragm-valve or similar structure to shut olf) the su ply of heating medium from the outlet 14 o a ipe 15. The regua top plate 16 and a casing 17 fastened together Specification of. Letters Patent. Application filed October l15, 1906. Serial No. 338,938.

rammed nay 2e, 190s.

:flanges by means of the screws 18, and form- Inside this chamber are a ing a chamber. pair of bearings 19, and the pivotal screws 20 old a lever 21 so that it is easily tilted, one

end of the lever encircling a rod 22 which is screwed up into a follower rod 23, this follower rod having its upper end 24l abutting against the end 25 of a sleeve or tube 26 which is secured to the projection 27 on the top plate 16.l The follower rod is held so that its end 24 contacts with the end of the tube, by means of a spring 28 and is kept from turning by means of the ribs 29 fitting into thejslots 30 in the projection' 27.

31 which screws into a recess in the projection 27, and a spring 32 is inserted between the washer 31 and a cup 33, resting on the end of the lever 2l so that the washer 31 acts as a support for both springs, one spring 'tending to hold the follower rod 23 up, and

the other spring 32 tending to force the end of the lever 21 down. The free end of the *lever 21 has screwed therein, a cup 34 which holds a rubberring 35 which fits against a boss 36 screwed into the top plate, and the cup 34 has a projecting post A37 thatfpasses up'fthrough the boss 36 and engages the bottom end of a stem`38 that has a valve 39 on its upper end, the valve 39 lbeing normally forced shut by a spring 40 bearing on its' other end on the cap 41 which has a vent or perforation 42 in its top D The operation of the device is as follows: To one end of the casing, as at 43, the pipe 11 is attached yand the air under pressure passes through -the duct 4'4 in the casing).l thus the casing is undera constant air pressure. If the temperature in the room becomes higher than the degree to which the regulator is adjusted, the tube 26, which is made'of a metal easily aected by heat, expands and the increased length of the tube allows the follower rod 23 to-slide up, this slidingbeing caused by the spring 28 which is-stronger than the spring 32. This raising of the follower rod pulls up the rod 22 and conse uently that end of the lever 21, and drops t e other end containing the cup4 34 and pulls the rubber` ring 35 away from the boss or seaft'36, allowing the compressed airor other fluid to pass through the duct 45 and out through the portion 46, to which'the pipe 12 is connected. This will cause the diaphragm valve,"or other mechanism to which the regulator isA at-lat their marginal l tached, to operate and shut oif the heating 70 The spring 28 rests down against a Washer medium. When the temperature goes down, the tube 26 contracts and forces the rod 23 down which allows the spring 32 to force that end ofthe lever 21 dow-n, as in Fig. 2. The ring 35, being of rubber or soft material, comes in contact with the seat 36 and when it is sufficiently compressed, to make a tight joint, the pin 37 engages the bottom of the stem 38 and lifts the valve 39 against the pressure of the spring 40, and the pressure in the pipe 12 can pass out through the vent 42.

To regulate the apparatus the tension on the spring 28 is altered, and this is accomplished by having the end of the rod 22 provided with a coupling 4.7 on the other end of which is a rod 48 passing through a stuffing box 49a. On this rod 48 is affixed an index hand 49 which registers on a scale 50 so that a very nice adjustment can be secured. The end of the rod 48 is provided with a squared portion 51 to receive a handle or key, and when this is turned, the screw-threaded rod 22 raises or lowers the follower rod to regulate the tension on the spring 28, the follower rod being prevented from turning by the ribs 29.

In Figs 6 and 7 I illustrate a modified form of this regulating device which ismore adapted for handy use, vwhere the bottom of the casing of the regulator isv not easily seen. In this modified structure the shaft 48 is provided, instead of the hand 49, with a lever 52 which is slotted at 53, and the head 54 of a rod 55 is held in engagement with it by C means of a spring 56,'the other end of the spring fitting against the bearing 57 on the casing. The rod 55 is screw-threaded where it passes through the bearing 57, and is provided with a hand 58 which registers on a scale 59 attached to the bearing 57 and a squared portion 60 on the rod 55 permitsthe turning of the shaft, or rod, bymeans of a screw or handle.

It will be evident that this apparatus can be used to regulate the admission of a refrigerator medium in refrigeration, and also to operate a Ventilating apparatus.

Having thus described my invention, what I claim is y In a temperature regulator a casing having inlet and outlet ports, the outlet port having a vent therein, a valve in the vent having a stem thereon', a valve for closing the outlet port and engaging the stem and opening the valve in the vent, a lever for operating the outlet valve, a follower rod, a tube secured to the casing and encircling the rod and having its free end abutting against the end of the follower rod the tube contracting and cx-y panding according to temperature changes, and a'head on the followerrod, the casing having a recess to allow the head to slide, slots on the opposed sides f the recess, ribs on the head of the followe'r rod working in the slots, a washer secured in the recess, a spring between the follower rod and the washer, and a second spring between theI washer and the lever. i

In testimony, that I claim the foregoing, l. have hereunto' set my hand this 9th day of October 1906.

IIRNER F. DAVIS.

Witnesses:

WM. H. CAMFIELD, E. A. PELL. 

